www 006006

© Weatherford. All rights reserved.

ARTIFICIAL LIFT SYSTEMS



VSH2 NitrogenOver Hydraulic Unit

Reciprocating rod pumping unit

Operates with conventional sucker rod system

Uses nitrogen-over-hydraulic technology

Direct drive pump

Variable SPM in seconds

Greater well flexibility

Electric or gas operated

What is the VSH2 ?



VSH2Nitrogen-over-Hydraulic System

Two-stage cylinder

Nitrogen over Hydraulic Accumulator

Nitrogen pressure pushes the accumulator piston down forcing the hydraulic oil from the accumulator into the upper stage of the cylinder lifting 2/3 of the rod and fluid weight.

Polish rod direction is reversed via proximity switches sending a signal to the Electric Displacement Valve that changes the chamber in the lower stage to which the hydraulic oil flows.



VSH2 Pumping UnitOperating Principle

Nitrogen pushes down on the accumulator piston. Hydraulic fluid under piston is forced into upper chamber thus pushing the cylinder piston up.

Servo Valve routes pressurized fluid to lower stages to cycle the cylinder up or down.

Proximity switches activate the EDC valve

Change SPM by turning switches



VSH2Direct Drive Pump

Variable speed

Rated 3100 rpm

Rated at 6000 lb

Closed loop

Less leak points

Less parts

Long service life



VSH2Electric Motor Drive

Direct drive

No belts

No sheaves



VSH2 BenefitsSpecifically developed for the fields with heavy crude

oil, wells with rod fall problems and better well control.

Lifts greater loads using less energy

Handles PPRL’s up to 40,000 lbs.

Pumps depths to 10,000 ft.

Changes strokes per minute with a turn of the switch in either direction

Srokes per Minute can be as slow as 0 and as fast as 9 (depending on model)



Three sizes - 60”,120” & 150”

SPM - 0 to 9 (depending on unit size)

PPRL - 35,000 - 40,000 lbs.

Three moving parts - cylinder, accumulator and direct drive pump (excluding prime mover)

Safety shutdowns - rod separation, high pressure, low fluid level, high oil temp.

SPM changes with the turn of a switch

Adjustable stroke lengths

Skid size - 5ft x 8ft x 74”

VSH2 Benefits



VSH2Why is this System Different ?

Nitrogen-over-Hydraulic technology

Three moving parts

Greater rod loads than conventional units

Change SPM quicker

Wider range of applications

Lower maintenance

Can reduce energy consumption



VSH2Three Moving Parts

Accumulator nitrogen / hydraulic

Cylinder two stage double acting

Pump direct drive variable speeds up & down



VSH2Control Box

Panel off/onBridal separationHigh pressure Jog up/jog dwnRe-set buttonManual / autoPower On lightSpeed upSpeed downAuto start button



VSH2Maintenance

One filter after the first 30 days and then every 5 months thereafter.

Normal equipment visual inspections.



VSH2Safety Controls

Low hydraulic oil level

High oil temperature

Manual thermometer

Rod separation

Over torque relief valve

High pressure alarm light



VSH2Rod Separation Plate

When the pump sticks, separation between plate and switch occurs

This de-strokes the unit and stops the unit from stroking until the polish rod falls or the pumper is aware of the problem

If the polish rods falls later, the unit continues to stroke until separation occurs again

A red alarm light indicates separation has occurred sometime during the day or night.



VSH2Base Plate Installation



VSH2Pedestal Mount Unit



VHS2Portable Unit



VSH2Portable 120” Natural Gas Unit



VSH2Gas Manifold

Isolates individual bottles

Greater fill capacities

Less nitrogen loss



VSH2Overview

When to use - temporary or permanent

Well evaluating and testing

During downtime for repairs of conventional

Lengthily delivery times

Production decline to reduce energy consumption

Looking for a unit that can reduce freight,setup charges,site preparation, maintenance and energy consumption

Greater well control

Greater well flexibility

www 006006

Documents

reduce energy

moving parts

rights reserved

vsh2 benefits

vsh2 nitrogen

accumulator

cylinder

vsh2